99109-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99109-05-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,1,0 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 99109-05:
(7*9)+(6*9)+(5*1)+(4*0)+(3*9)+(2*0)+(1*5)=154
154 % 10 = 4
So 99109-05-4 is a valid CAS Registry Number.